The culprit was Penelope Paige. You can tell by using the graph the taller the person the bigger the foot size. Also you can fake a large shoe size with a small foot but you cannot fake a small shoe with a large foot and Penelope Paige had the smallest foot.
Graphing Periodic Trends: Robbie Peak and Ben Norris
Graphing Periodic Trends: Robbie Peak and Ben Norris